Early epidemiological studies of COVID-19 [1]}, [2]} implicated certain risk factors, such as age, gender and pre-existing conditions may impact transmission and severity of illness. As the pandemic progressed, researchers began to understand more about asymptomatic transmission [3]}, [4]}, [5]}, discovering that there may be many more cases of COVID-19 than once realised. This led some researchers to suggest that the morbidity rate of COVID-19 is lower than initially presumed [6]}, though this data is difficult to calculatehttps://ourworldindata.org/mortality-risk-covid.
